How long does it take for slimming facial injections to take effect?

In general, "face slimming injections" refer to injectable botulinum toxin type A. Injectable botulinum toxin type A works by blocking the transmission of nerve signals between nerves and muscles through injection, thereby achieving the purpose of facial slimming. The typical reference price for injectable botulinum toxin type A ranges from 1,500 to 6,000 yuan per injection. Noticeable improvement usually appears within 7–14 days, although side effects such as facial hollowing or allergic reactions may occur. The effects of injectable botulinum toxin type A generally become visible within 7–14 days, but the exact timing depends on individual physical conditions, dosage, and other factors. Detailed analysis is as follows:

If an individual has good overall health, rapid drug absorption, and receives an appropriate injection dose, results typically appear within 7–10 days. At this point, the drug quickly acts on the masseter muscles, causing them to gradually atrophy, thus enhancing facial firmness and achieving a slimmer, more contoured appearance.

If an individual has poor physical condition, slower drug absorption, or if the physician adjusts the dosage based on the size and shape of the masseter muscles—resulting in a higher dose—it may take 10–14 days for the effects to become noticeable. In such cases, the drug requires more time to act on the masseter muscles and induce gradual muscle atrophy.

It is recommended to visit a正规 medical institution and undergo the procedure under the guidance of a qualified physician to ensure both effectiveness and safety. Additionally, it's advisable to adjust your diet appropriately in daily life, avoiding excessively hard foods to reduce stimulation and strain on the masseter muscles and promote recovery.